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/**
* Marlin 3D Printer Firmware
* Copyright (c) 2020 MarlinFirmware [https://github.com/MarlinFirmware/Marlin]
*
* Based on Sprinter and grbl.
* Copyright (c) 2011 Camiel Gubbels / Erik van der Zalm
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <https://www.gnu.org/licenses/>.
*
*/
/**
* PersistentStore for Arduino-style EEPROM interface
* with simple implementations supplied by Marlin.
*/
#ifdef __STM32F1__
#include "../../inc/MarlinConfig.h"
#if ENABLED(IIC_BL24CXX_EEPROM)
#include "../shared/eeprom_if.h"
#include "../shared/eeprom_api.h"
//
// PersistentStore
//
#ifndef MARLIN_EEPROM_SIZE
#error "MARLIN_EEPROM_SIZE is required for IIC_BL24CXX_EEPROM."
#endif
size_t PersistentStore::capacity() { return MARLIN_EEPROM_SIZE; }
bool PersistentStore::access_start() { eeprom_init(); return true; }
bool PersistentStore::access_finish() { return true; }
bool PersistentStore::write_data(int &pos, const uint8_t *value, size_t size, uint16_t *crc) {
size_t written = 0;
while (size--) {
uint8_t v = *value;
uint8_t * const p = (uint8_t * const)pos;
// EEPROM has only ~100,000 write cycles,
// so only write bytes that have changed!
if (v != eeprom_read_byte(p)) {
eeprom_write_byte(p, v);
if (++written & 0x7F) delay(2); else safe_delay(2); // Avoid triggering watchdog during long EEPROM writes
if (eeprom_read_byte(p) != v) {
SERIAL_ECHO_MSG(STR_ERR_EEPROM_WRITE);
return true;
}
}
crc16(crc, &v, 1);
pos++;
value++;
}
return false;
}
bool PersistentStore::read_data(int &pos, uint8_t *value, size_t size, uint16_t *crc, const bool writing/*=true*/) {
do {
uint8_t * const p = (uint8_t * const)pos;
uint8_t c = eeprom_read_byte(p);
if (writing) *value = c;
crc16(crc, &c, 1);
pos++;
value++;
} while (--size);
return false;
}
#endif // IIC_BL24CXX_EEPROM
#endif // __STM32F1__
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